/*-
 * Copyright (c) 1989, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  @(#)unistd.h    8.2 (Berkeley) 1/7/94
 * $FreeBSD$
 */

#ifndef _SYS_UNISTD_H_
#define _SYS_UNISTD_H_

#include <sys/cdefs.h>

/*
 * POSIX options and option groups we unconditionally do or don't
 * implement.  Those options which are implemented (or not) entirely
 * in user mode are defined in <unistd.h>.  Please keep this list in
 * alphabetical order.
 *
 * Anything which is defined as zero below **must** have an
 * implementation for the corresponding sysconf() which is able to
 * determine conclusively whether or not the feature is supported.
 * Anything which is defined as other than -1 below **must** have
 * complete headers, types, and function declarations as specified by
 * the POSIX standard; however, if the relevant sysconf() function
 * returns -1, the functions may be stubbed out.
 */
#define _POSIX_ADVISORY_INFO        200112L
#define _POSIX_ASYNCHRONOUS_IO      0
#define _POSIX_CHOWN_RESTRICTED     1
#define _POSIX_CLOCK_SELECTION      (-1)
#define _POSIX_CPUTIME          200112L
#define _POSIX_FSYNC            200112L
#define _POSIX_IPV6         0
#define _POSIX_JOB_CONTROL      1
#define _POSIX_MAPPED_FILES     200112L
#define _POSIX_MEMLOCK          (-1)
#define _POSIX_MEMLOCK_RANGE        200112L
#define _POSIX_MEMORY_PROTECTION    200112L
#define _POSIX_MESSAGE_PASSING      200112L
#define _POSIX_MONOTONIC_CLOCK      200112L
#define _POSIX_NO_TRUNC         1
#define _POSIX_PRIORITIZED_IO       (-1)
#define _POSIX_PRIORITY_SCHEDULING  200112L
#define _POSIX_RAW_SOCKETS      200112L
#define _POSIX_REALTIME_SIGNALS     200112L
#define _POSIX_SEMAPHORES       200112L
#define _POSIX_SHARED_MEMORY_OBJECTS    200112L
#define _POSIX_SPORADIC_SERVER      (-1)
#define _POSIX_SYNCHRONIZED_IO      (-1)
#define _POSIX_TIMEOUTS         200112L
#define _POSIX_TIMERS           200112L
#define _POSIX_TYPED_MEMORY_OBJECTS (-1)
#define _POSIX_VDISABLE         0xff

#if __XSI_VISIBLE
#define _XOPEN_SHM          1
#define _XOPEN_STREAMS          (-1)
#endif

/*
 * Although we have saved user/group IDs, we do not use them in setuid
 * as described in POSIX 1003.1, because the feature does not work for
 * root.  We use the saved IDs in seteuid/setegid, which are not currently
 * part of the POSIX 1003.1 specification.  XXX revisit for 1003.1-2001
 * as this is now mandatory.
 */
#ifdef  _NOT_AVAILABLE
#define _POSIX_SAVED_IDS    1 /* saved set-user-ID and set-group-ID */
#endif

/* Define the POSIX.1 version we target for compliance. */
#define _POSIX_VERSION      200112L

/* access function */
#define F_OK        0   /* test for existence of file */
#define X_OK        0x01    /* test for execute or search permission */
#define W_OK        0x02    /* test for write permission */
#define R_OK        0x04    /* test for read permission */

/* whence values for lseek(2) */
#ifndef SEEK_SET
#define SEEK_SET    0   /* set file offset to offset */
#define SEEK_CUR    1   /* set file offset to current plus offset */
#define SEEK_END    2   /* set file offset to EOF plus offset */
#endif
#if __BSD_VISIBLE
#define SEEK_DATA   3   /* set file offset to next data past offset */
#define SEEK_HOLE   4   /* set file offset to next hole past offset */
#endif

#ifndef _POSIX_SOURCE
/* whence values for lseek(2); renamed by POSIX 1003.1 */
#define L_SET       SEEK_SET
#define L_INCR      SEEK_CUR
#define L_XTND      SEEK_END
#endif

/* configurable pathname variables */
#define _PC_LINK_MAX         1
#define _PC_MAX_CANON        2
#define _PC_MAX_INPUT        3
#define _PC_NAME_MAX         4
#define _PC_PATH_MAX         5
#define _PC_PIPE_BUF         6
#define _PC_CHOWN_RESTRICTED     7
#define _PC_NO_TRUNC         8
#define _PC_VDISABLE         9

#if __POSIX_VISIBLE >= 199309
#define _PC_ASYNC_IO        53
#define _PC_PRIO_IO     54
#define _PC_SYNC_IO     55
#endif

#if __POSIX_VISIBLE >= 200112
#define _PC_ALLOC_SIZE_MIN  10
#define _PC_FILESIZEBITS    12
#define _PC_REC_INCR_XFER_SIZE  14
#define _PC_REC_MAX_XFER_SIZE   15
#define _PC_REC_MIN_XFER_SIZE   16
#define _PC_REC_XFER_ALIGN  17
#define _PC_SYMLINK_MAX     18
#endif

#if __BSD_VISIBLE
#define _PC_ACL_EXTENDED    59
#define _PC_ACL_PATH_MAX    60
#define _PC_CAP_PRESENT     61
#define _PC_INF_PRESENT     62
#define _PC_MAC_PRESENT     63
#define _PC_ACL_NFS4        64
#endif

/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
#define _PC_MIN_HOLE_SIZE   21

#if __BSD_VISIBLE
/*
 * rfork() options.
 *
 * XXX currently, some operations without RFPROC set are not supported.
 */
#define RFNAMEG     (1<<0)  /* UNIMPL new plan9 `name space' */
#define RFENVG      (1<<1)  /* UNIMPL copy plan9 `env space' */
#define RFFDG       (1<<2)  /* copy fd table */
#define RFNOTEG     (1<<3)  /* UNIMPL create new plan9 `note group' */
#define RFPROC      (1<<4)  /* change child (else changes curproc) */
#define RFMEM       (1<<5)  /* share `address space' */
#define RFNOWAIT    (1<<6)  /* give child to init */
#define RFCNAMEG    (1<<10) /* UNIMPL zero plan9 `name space' */
#define RFCENVG     (1<<11) /* UNIMPL zero plan9 `env space' */
#define RFCFDG      (1<<12) /* close all fds, zero fd table */
#define RFTHREAD    (1<<13) /* enable kernel thread support */
#define RFSIGSHARE  (1<<14) /* share signal handlers */
#define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */
#define RFSTOPPED   (1<<17) /* leave child in a stopped state */
#define RFHIGHPID   (1<<18) /* use a pid higher than 10 (idleproc) */
#define RFTSIGZMB   (1<<19) /* select signal for exit parent notification */
#define RFTSIGSHIFT 20  /* selected signal number is in bits 20-27  */
#define RFTSIGMASK  0xFF
#define RFTSIGNUM(flags)    (((flags) >> RFTSIGSHIFT) & RFTSIGMASK)
#define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT)
#define RFPROCDESC  (1<<28) /* return a process descriptor */
#define RFPPWAIT    (1<<31) /* parent sleeps until child exits (vfork) */
#define RFFLAGS     (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \
    RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \
    RFPROCDESC | RFPPWAIT)
#define RFKERNELONLY    (RFSTOPPED | RFHIGHPID | RFPPWAIT | RFPROCDESC)

#endif /* __BSD_VISIBLE */

#endif /* !_SYS_UNISTD_H_ */
